/*
 * Copyright (C) 2014 Jörg Prante
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.xbib.io;

import java.util.Map;

/**
 * A packet for transporting data chunks with meta data in sessions
 */
public interface Packet<P> {

    Map<String, Object> meta();

    Packet<P> meta(String key, Object value);

    P payload();

    Packet<P> payload(P packet);
}
